69rmr - found a good load

[AJC1]

I second this if you want a mag fed 223 bolt gun. Its a spend, but honestly you only need 3-4 mags for a bolt gun. I thought about this for a very long time, and even using the old school ASC SSTL mags the longest COAL I could get was 2.31.

Its also why I plan on a single shot now. I have mag fed everything but honestly I barely use them anymore in my bolt guns. I find hand single feeding my bolt guns to be somewhat therapeutic and slows me down while Im on the line.

Oh please build a falling block 223...

 

[Kaldor]

Oh please build a falling block 223...

That would be cool, but I'm going to settle with a left feed, right eject BR action

 

[z7]

Well seeing your results im gonna have to get some. 3000 fps is a nice speed for a heavy .224 bullet.

It’s a 26” barrel, which helps a lot

 

[Nature Boy]

That would be cool, but I'm going to settle with a left feed, right eject BR action

I support this.

My suggestion would be a 30” barrel chambered with an ISSF reamer so you can load the 90gn bullets.

Recoil of a 223 with the ballistics of a .308 shooting 185gn Juggernauts

 

[Kaldor]

I support this.

My suggestion would be a 30” barrel chambered with an ISSF reamer so you can load the 90gn bullets.

Recoil of a 223 with the ballistics of a .308 shooting 185gn Juggernauts

Talked about that with my smith and going with a 6 or 6.5 twist, but if I do that, the 69s and 77s I normally shoot would be way off the lands to be accurate in the degree I expect. So a 7 twist 223 Wylde chamber, set roughly for 77s to be the primary bullet. Also kicked around 22BR, but I have 223 brass coming out my ears, and some days I just want to grab a big ammo can from the shelf and go shoot, not load yet another caliber. Barrel length will be 26" as I want it to be kid friendly so I dont want a tank. I teach a lot of kids, and while a mag dump from an AR is a lot of fun, it's not teaching them much. I figure I can get 2900 fps from a 77gr SMK, which is plenty for 600 yards, and still a challenge on windy days.

 

[nastynatesfish]

I get pretty decent results from the 69s using cfe223. I started working with n133 and it shoots them a lot better. I’ve got a 20” remington tactical 1-9tw. I got some of the 75s and they’re harder to get to shoot. I run my 75gr Hornady at 3008fps ave using n540 and no pressure. Best so far I’ve got is just under an inch with the 75s. The 69s I can manage 3/4 pretty regular.
The pic is the 75s. And it’s 25.6gr not 26.6gr.

 

[AJC1]

Talked about that with my smith and going with a 6 or 6.5 twist, but if I do that, the 69s and 77s I normally shoot would be way off the lands to be accurate in the degree I expect. So a 7 twist 223 Wylde chamber, set roughly for 77s to be the primary bullet. Also kicked around 22BR, but I have 223 brass coming out my ears, and some days I just want to grab a big ammo can from the shelf and go shoot, not load yet another caliber. Barrel length will be 26" as I want it to be kid friendly so I dont want a tank. I teach a lot of kids, and while a mag dump from an AR is a lot of fun, it's not teaching them much. I figure I can get 2900 fps from a 77gr SMK, which is plenty for 600 yards, and still a challenge on windy days.

I'd throat for an 80, and the heavier AR bullets will work fine. The horn 88 and 90smk shoot in real deap throats so I just left that on the table.

 

[Nature Boy]

Talked about that with my smith and going with a 6 or 6.5 twist, but if I do that, the 69s and 77s I normally shoot would be way off the lands to be accurate in the degree I expect. So a 7 twist 223 Wylde chamber, set roughly for 77s to be the primary bullet. Also kicked around 22BR, but I have 223 brass coming out my ears, and some days I just want to grab a big ammo can from the shelf and go shoot, not load yet another caliber. Barrel length will be 26" as I want it to be kid friendly so I dont want a tank. I teach a lot of kids, and while a mag dump from an AR is a lot of fun, it's not teaching them much. I figure I can get 2900 fps from a 77gr SMK, which is plenty for 600 yards, and still a challenge on windy days.

1:7 twist for the 90 VLDs is plenty. Folks using anything faster have experienced blow ups when they try to push them hard.

I have a Wylde chambered .223 and wish it had a longer throat, not only for longer bullets but also because I’m hamstrung with seating depth, including with the 77gn SMKs.

I have a lot easier time finding accuracy with jumping bullets than I do with too much bullet shoved in the neck

 

[kmw1954]

Two years ago I thought I found a load for my Savage Model 10 using TAC until it got hot outside and it fell apart. So Moved to Benchmark and found one that was even better and shot it all winter in our league. I then moved to a Savage Model 11 with a Model 12 Varmint barrel and soon found the new barrel did not like the RMR one bit.

So now I am at a point I need to order more bullets so I decided to start over and run a new ladder with the RMR and TAC and quickly found a new node 0.5gr below what I had used previously. So now I will have to load this again and see if it repeats. The two loads in the middle each shot 3/4" 200yd groups.

 

[Kaldor]

I'd throat for an 80, and the heavier AR bullets will work fine. The horn 88 and 90smk shoot in real deap throats so I just left that on the table.

1:7 twist for the 90 VLDs is plenty. Folks using anything faster have experienced blow ups when they try to push them hard.

I have a Wylde chambered .223 and wish it had a longer throat, not only for longer bullets but also because I’m hamstrung with seating depth, including with the 77gn SMKs.

I have a lot easier time finding accuracy with jumping bullets than I do with too much bullet shoved in the neck

Good info. I was more or less planning a dummy round with a 77 SMK with .200 bullet of the in the case neck. I could probably throat for a Berger 80 VLD too. Really don't have a desire to go heavier than that.

 

[AJC1]

Good info. I was more or less planning a dummy round with a 77 SMK with .200 bullet of the in the case neck. I could probably throat for a Berger 80 VLD too. Really don't have a desire to go heavier than that.

I shoot a lot of 80smk and 80elds. Never messed with vlds. I'm not sure if they would even require a longer throat based on its very acute taper angle.

 

[MarshallDodge]

I shoot a lot of 80smk and 80elds. Never messed with vlds. I'm not sure if they would even require a longer throat based on its very acute taper angle.

The 80 ELD-M is a VLD profile/secant ogive.

Berger uses the term VLD but it has become a commonly used term to describe the sharper secant ogive, like Kleenex is to tissue.

 

[AJC1]

The 80 ELD-M is a VLD profile/secant ogive.

Berger uses the term VLD but it has become a commonly used term to describe the sharper secant ogive, like Kleenex is to tissue.

Well color me purple... probably not the last time I'll be found not knowing.... I'll add that to the knowledge bank.

 

[joneb]

so what caliber are you shooting?

.22 caliber could be a dozen different cartridges, your question will not answer your question.

 

[kmw1954]

.22 caliber could be a dozen different cartridges, your question will not answer your question.

OP clarified that in post #4.

 

[ParallelCode]

That would be cool, but I'm going to settle with a left feed, right eject BR action

I'd like something like that as well.